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Abstract

We discuss the specific potential of a long baseline optical interferometer at the Antarctica Dome C site for
high limiting magnitude observations. First we compute the potential limiting magnitude for cophasing an
interferometer with N diameter D apertures. Combining this with a computation of the isopistonic angle and of
the density of stars, we evaluate that an interferometer with 1.5 m telescopes performing off axis fringe tracking
will provide a minimum sky coverage of 50% in the direction of the galactic pole, while at Paranal, this could be
achieved only if the individual apertures are 10 times larger. This is due to the fact that most of optical seeing
at Dome C is produced in the first 30 meters above the ground. This makes the Dome C an unique site on earth
to permit optical interferometers to reach high magnitudes and therefore contribute to extra galactic science and
cosmology.

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Journal of Applied Remote SensingJournal of Astronomical Telescopes Instruments and SystemsJournal of Biomedical OpticsJournal of Electronic ImagingJournal of Medical ImagingJournal of Micro/Nanolithography, MEMS, and MOEMSJournal of NanophotonicsJournal of Photonics for EnergyNeurophotonicsOptical EngineeringSPIE Reviews